112 research outputs found
Origin of the anomalous piezoelectric response in wurtzite ScAlN alloys
The origin of the anomalous, 400% increase of the piezoelectric coefficient
in ScAlN alloys is revealed. Quantum mechanical calculations show
that the effect is intrinsic. It comes from a strong change in the response of
the internal atomic coordinates to strain and pronounced softening of C
elastic constant. The underlying mechanism is the flattening of the energy
landscape due to a competition between the parent wurtzite and the so far
experimentally unknown hexagonal phases of the alloy. Our observation provides
a route for the design of materials with high piezoelectric response.Comment: 10 pages, 4 figures, accepted for publication in Phys. Rev. Let
Wurtzite structure Sc1âxAlxN solid solution films grown by reactive magnetron sputter epitaxy: Structural characterization and first-principles calculations
CMOS-Integrated Film Bulk Acoustic Resonators for Label-Free Biosensing
The throughput is an important parameter for label-free biosensors. Acoustic resonators like the quartz crystal microbalance have a low throughput because the number of sensors which can be used at the same time is limited. Here we present an array of 64 CMOS-integrated film bulk acoustic resonators. We compare the performance with surface plasmon resonance and the quartz crystal microbalance and demonstrate the performance of the sensor for multiplexed detection of DNA
Anomalously high thermoelectric power factor in epitaxial ScN thin films
Thermoelectric properties of ScN thin films grown by reactive magnetron sputtering on Al2O3(0001) wafers are reported. X-ray diffraction and elastic recoil detection analyses show that the composition of the films is close to stoichiometry with trace amounts (similar to 1 at. % in total) of C, O, and F. We found that the ScN thin-film exhibits a rather low electrical resistivity of similar to 2.94 mu Omega m, while its Seebeck coefficient is approximately similar to-86 mu V/K at 800 K, yielding a power factor of similar to 2.5 x 10(-3) W/mK(2). This value is anomalously high for common transition-metal nitrides.Funding Agencies|Swedish Research Council (VR)|621-2009-5258
The role of consumer generated content, electronic word of mouth and online reviews in the travel planning process
The original idea of the work was sparked during my time in the tourism industry and I was
trusted to be in charge of generating content for our webpage. My interest in marketing
started growing at this moment and motivated me to pursue my studies at JAMK. For the
thesis I decided to keep my focus on content generation but rather than focusing on firm
generated content I turned my focus towards the customer and consumer generated
content.
The main objectives were to examine the general perception of CGC, eWOM and online
reviews. Whether or not consumers trust in content that is created by fellow consumers
and what motivates them to post content themselves.
The approach was quantitative as the instrument for data collection was a questionnaire to
get insight in the general publicâs view on CGC, eWOM and online reviews. The
questionnaire was created with google docs and was distributed over various social media
platforms. The focus was wide as it targeted everyone who at some point in their life has
travelled for pleasure.
The results showed that CGC, eWOM and online reviews plays a big role in the early stages
of travel planning but the importance of them fades as the traveler gets further with his or
her plans. It also shows that the most common platforms for consumers to read various
types of CGC from are dedicated review webpages, travel agencies own webpages as well
as social media platforms such as Facebook and Instagram. Conclusions that were drawn
are also established in other researches
Om författningarne för svenska handelns upphjelpande under Gustaf II Adolphs regering : akademisk afhandling som med vidtberömda filos. fakultetens tillstĂ„nd under inseende af ... Olof Wingqvist ... för philosophiska graden till offentlig granskning framstĂ€lles af författaren Johan Wolter Arnberg af Ăstgötha nation pĂ„ gustav. lĂ€rosalen d. 3 juni 1854 p. v. t. f. m
To teach about narrative texts : How to work with genre pedagogy with focus on narrative texts
The intention of my research is to increase understanding of what teaching with genre pedagogy, with focus on narrative texts, can look like. Through previous research and literature, I describe the emergence of genre pedagogy, why genre pedagogy is used, what a narrative text is and how it can be evaluated. The empirical material of the study consists of qualitative research interviews with teachers, as well as document analyses of the teachersâ educational plans with the purpose to gain a broader view of teaching with narrative texts. I have deliberately chosen the school I carried out my survey on. From my own experience, I know that this school work with genre pedagogy, which made it easier for me and the teachers as they knew the concepts, methods and terminology behind my questions. The results of the survey show that genre pedagogy promotes studentsâ learning, regardless of whether teachers choose to follow the structured circle model or focus on the creative personal writing. Both former researches and my teacher informants believe that the genre pedagogical teaching helps the studentsâ to develop subject language and their strategies for reading and writing texts in different genres. Nevertheless, as the results display, extra support is sometimes needed to further enhance studentsâ writing performance. The result also shows that the assessment of narrative texts usually has the best effect if it is written and formative. Intentionen med min undersökning Ă€r att öka förstĂ„elsen för hur undervisning med genrepedagogik med fokus pĂ„ berĂ€ttande texter kan se ut. Genom att utgĂ„ frĂ„n tidigare forskning och litteratur beskriver jag bland annat genrepedagogikens uppkomst, varför genrepedagogik anvĂ€nds, vad den berĂ€ttande texten Ă€r, samt hur denna kan bedömas. Undersökningens empiri bestĂ„r av kvalitativa forskningsintervjuer gjorda med lĂ€rare, samt dokumentanalyser av lĂ€rarnas pedagogiska planeringar med syfte att fĂ„ en bredare bild av undervisning av berĂ€ttande texter. Skolan jag valt att utföra min undersökning pĂ„ har jag medvetet valt dĂ„ jag sedan tidigare vetat om att de arbetar genrepedagogiskt, vilket underlĂ€ttade bĂ„de för mig och lĂ€rarinformanterna dĂ„ de kĂ€nde till begreppen i mina frĂ„gestĂ€llningar. Resultaten av undersökningen visar att genrepedagogisk undervisning frĂ€mjar elevernas lĂ€rande, oavsett om lĂ€rarna vĂ€ljer att följa den strukturerade cirkelmodellen eller om de fokuserar pĂ„ det kreativa personliga skrivandet. BĂ„de tidigare forskare och mina lĂ€rarinformanter menar att den genrepedagogiska undervisningen gör att bĂ„de elevernas ÀmnessprĂ„k och strategier att lĂ€sa och skriva texter inom olika genrer utvecklas. Trots detta framgĂ„r dock i resultatet att extra stöttning ibland behövs för att stĂ€rka elevernas skrivutveckling ytterligare. I resultatet framgĂ„r Ă€ven att bedömningen av berĂ€ttande texter oftast har bĂ€st effekt om den Ă€r skriftlig och formativ
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